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- From: bmiller@Ceram.COM (Bill Miller)
- Newsgroups: comp.sys.sun.hardware,comp.sys.sun.admin
- Subject: Re: SUMMARY: Has anyone used CERAM's TurboSwap board?
- Message-ID: <bmiller.727715920@ceram.com>
- Date: 22 Jan 93 15:18:40 GMT
- References: <1993Jan18.135900.1741@dragon.acadiau.ca>
- Followup-To: comp.sys.sun.hardware
- Organization: Ceram Inc., Colorado Springs, CO.
- Lines: 58
-
- (I attempted to post this earlier. I'm not sure it got out as there
- was a mail error returned. So if it appears more than once - I'm
- sorry for your having to delete it twice!)
-
- I am an employee of CERAM, the manufacture of the TurboSwap product.
- I thought it best that we clarify some points made in this SUMMARY so
- that all interested readers would have a complete picture. I hope this
- doesn't come across as a sales pitch - just more complete (and of course
- totally unbiased) information.
-
- First off - Thanks to all participants. The discussion
- here helps to clear up some misconceptions about TurboSwap.
-
- Further Information:
-
- 1. TurboSwap is not intended to be a cheaper alternative to adding a
- few memory SIMMs. It is intended to give users who work with very large
- in memory data sets a way to run on machines that won't hold enough memory.
- It makes the most sense for in memory data set size requirements above 128M
- on most machines - above 64M on some. These are the break points where
- further memory expansion is either impossible, more expensive than TurboSwap,
- or creates system performance problems due to MMU design limitations.
- TurboSwap is not better/cheaper than adding memory in every case - but it
- clearly is in some cases.
-
- (If you don't know how large your in memory data set size is, run
- pstat -T|grep swap , the numerator of the displayed fraction is the size
- of your in memory data set at the moment you executed the commnad -
- you can also mail to turbotool@ceram.com for a utility that will monitor
- this for you)
-
- 2. TurboSwap will allow you to put up to 960MB fast swap on any SBus
- machine. Therefore, you might be able to use an IPX or an LX to run
- something that would have otherwise required an SS10 or 600MP to hold
- sufficient memory. When you compare the cost of the hole package, TurboSwap
- starts to look realy cheap! And its fully expandable up to 960MB from any
- starting point in the product line.
-
- 3. TurboSwap might be a better long term value if you expect your memory
- requirements to grow. If you fill your machine up with SIMMs and then need
- more memory what will you do?
-
- A. Throw out your SIMMs and buy higher density SIMMs?
- B. Run your app on a more expensive box that hold more memory?
- C. Suffer with swap disk performance?
-
- If you add TurboSwap instead of SIMMs you guarantee that you'll have
- room to grow.
-
- 4. The same TurboSwap cards work on SS1, SS1+, IPC, SS2, IPX, SS10, LC, LX
- 600MP, SC2000. Almost all of these require different memory SIMMs - a costly
- problem for transitions/upgrades.
-
- If you want some straight forward - not sales type - answers about TurboSwap
- you can mail to turboinfo@ceram.com for auto reply of Q&A about the product.
-
- Bill Miller
- bmiller@ceram.com
-